I recently mentioned Sir John Falstaff, as one of my favorite Shakespearean characters. The man was utterly disreputable: a drunk, a coward, a lecher, a glutton, utterly without redeeming qualities—what’s not to love about him? Clearly, Shakespeare loved him; Falstaff appears in four plays and is mentioned in another.
Agreed... Hotspur had been part of Bolingbroke's rise to power, but turned against him later.
Also, Shakespeare makes Hal and Hotspur contemporaries, but I believe the real Hotspur was close to a contemporary of Henry Bolingbroke.
Henry IV, Part I, is my favorite Shakespeare play.